Another picture features the star’s sweaty, post-workout cleavage and comes tagged with:

“Addicted to sweat !!!!!”

Finally, there’s a comedy snap of the singer (below) wearing a hat while using the tassels to form a fake mustache. “I’m thinking of shaving my mustache!!!!” reads the caption. Okay, she could lay off the exclamation marks, but it’s a reasonably entertaining start as celebrity accounts go. A strong B+ for effort.

Is the unverified account actually Madonna, though? It seems likely it is, particularly as the cleavage shot also appears on Madge’s Facebook page, which has over 10 million followers (at the time of writing, her Instagram followers total 84,000).

Madonna has an on-off (though mostly “off”) relationship with social media. She joined Twitter for all of two days during 2012, ostensibly to promote her record before leaving the 140-character messaging app for good.

What do you think? Is the Madonna Instagram account authentic? And what do you make of the pop queen’s first pics? Sound off in the comments!